The age of the child will be verified against documentation (birth certificate or immunization card, if available) or caregiver's report of the child's birth date. Length will be measured by a infantometer sensitive to 0.1 cm (SECA, model no. 4161721009, Hamburg, Germany). Body weight will be measured by a balance sensitive to 2 g (SECA 7281321009, Hamburg, Germany). Length-for-age (LAZ), weight-for-length (WLZ) and Weight-for-Age (WAZ) Z-scores will be calculated calculated following the Multicentre Growth Reference Study (MGRS) WHO growth standards 11. Edema will be examined by pressing the upper side of both feet for 3 seconds. Mid-upper arm circumference (MUAC) will be measured using TALC MUAC tape (UK). Standardization of the measuring equipments: Regular standardization of the baby weighing scale, and the length/length board with a known weight and length will be done.